What was found
MAIN DOOR HANDLE IS DIFFICULT TO OPEN FROM INSIDE THE AIRPLANE. RESEARCHED MED DOOR DESCRIPTION AND OPERATION, AND NO HISTORY FOUND CONNECTED TO THIS SQUAWK. ARRIVED AT ACFT. NO STRUGGLE FOUND OPENING FROM THE OUTSIDE. TRIED TO CLOSE AND OPEN FROM INSIDE, WAS ABLE TO DUPLICATE THE DISCREPANCY WHEN OPENING IT. INSPECTED THE DOOR HANDLE FROM OUTSIDE, INSPECTED DOOR LEVER FROM INSIDE, INSPECTED MAIN DOOR AND FOUND NO DEFECTS. BUT NOTICED THE GUIDE RODS, ARE VERY DIRTY. CLEANED THE RODS AND THE ROD HOUSINGS. AND LUBED. PERFORMED MULTIPLE OPS CHECKS, OPS CHECKS GOOD. ALL IN REF. TO MODE AMM 52-10-00.